若x、y、z满足(x-y)²+(z-y)²+2y²-2(x+z)y+2xz=0,且x、y、z是周长为48的三角形,求y 看得懂的!
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/31 19:22:36
![若x、y、z满足(x-y)²+(z-y)²+2y²-2(x+z)y+2xz=0,且x、y、z是周长为48的三角形,求y 看得懂的!](/uploads/image/z/8708483-11-3.jpg?t=%E8%8B%A5x%E3%80%81y%E3%80%81z%E6%BB%A1%E8%B6%B3%28x%EF%BC%8Dy%29%26%23178%3B%EF%BC%8B%28z%EF%BC%8Dy%29%26%23178%3B%EF%BC%8B2y%26%23178%3B%EF%BC%8D2%28x%EF%BC%8Bz%29y%EF%BC%8B2xz%3D0%2C%E4%B8%94x%E3%80%81y%E3%80%81z%E6%98%AF%E5%91%A8%E9%95%BF%E4%B8%BA48%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E6%B1%82y+%E7%9C%8B%E5%BE%97%E6%87%82%E7%9A%84%21)
x){ѽqCc%W=۽ŶVj)[XӭQ71{@j4+AU:OvLA7cӉ+^Nd.Z||ӽtmlTx>ڛR6IE1v6,l|wPɞYO'> 4#ZBRS[
HB5 +*m
l@
若x、y、z满足(x-y)²+(z-y)²+2y²-2(x+z)y+2xz=0,且x、y、z是周长为48的三角形,求y 看得懂的!
若x、y、z满足(x-y)²+(z-y)²+2y²-2(x+z)y+2xz=0,且x、y、z是周长为48的三角形,求y 看得懂的!
若x、y、z满足(x-y)²+(z-y)²+2y²-2(x+z)y+2xz=0,且x、y、z是周长为48的三角形,求y 看得懂的!
仔细看会发现是[(x-y)+(z-y)]²=0
x=y=z
y=16